I think it works fine now with 7.0.0-29 and these added to the GRUB default 
"amdgpu.ppfeaturemask=0xf7fff amdgpu.mes=0 amdgpu.cwsr_enable=0". For me 
without the ppfeaturemask, Ubuntu wasn't usable at all with Wayland or X11 
either.
I have disabled the hardware acceleration for all Chromium-based apps and 
browsers.

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https://bugs.launchpad.net/bugs/2163412

Title:
  [amdgpu] Ring gfx_0.1.0 reset fails (error -125) after SQC page fault
  in Chromium

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